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标签 javascript jquery css html
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我写了一段代码，点击一个元素会显示一个像 div 这样的上下文菜单，使用户能够剪切和粘贴列表元素，我向 div 中与粘贴操作相关的按钮添加了禁用类。但是当选择某些东西时，我想删除类“禁用”以启用粘贴按钮。代码如下:
html:
<div id="contextMenu" class="text-center" style="display: none; z-index: 1001; width: 242px;box-shadow:#D3D3D3 0px 0px 10px 4px; background-color: #FDFFC7; padding: 15px;">
<a class="btn btn-primary" style="margin: 3px 6px 3px 0px;" href="#" id="cut"><i class="fa fa-cut fa-lg"></i> Kes</a>
<div class="btn-group" style="margin: 3px 0px 3px 6px;">
<button type="button" class="btn btn-success disabled" id="InsertInto" title="Kestiğini kategoriyi seçtiğiniz kategorinin içine yapıştırır."><i class="fa fa-paste fa-lg"></i> Yapıştır</button>
<button type="button" class="btn btn-success dropdown-toggle disabled" data-toggle="dropdown"><span class="caret"></span></button>
<ul class="dropdown-menu" role="menu">
<li><a href="#" title="Seçtiğiniz kategorinin Üstüne ekler" id="AddAbove"><i class="fa fa-level-up fa-lg"></i> Üstüne Ekle</a></li>
<li><a href="#" title="Seçtiğiniz kategorinin Altına ekler" id="AddBelow"><i class="fa fa-level-down fa-lg"></i> Altına Ekle</a></li>
</ul>
</div>
JS:
$(document).on('click', '.ContextMenu', function () {
event.preventDefault();
var anySelected = $('.selected').length;
if (anySelected > 0) {
$("button", "#contextManu").removeClass('disabled');
}
var widgetPosition = $('#contextMenu').parent().offset();
$('#contextMenu').css('position', 'absolute');
var currentPosition = $(this).offset();
var contextLeft = (currentPosition.left) - $('#contextMenu').width() - widgetPosition.left - 10;
var contextTop = (currentPosition.top + 80) - widgetPosition.top;
$('#contextMenu').css('left', contextLeft);
$('#contextMenu').css('top', contextTop);
$('#contextMenu').slideDown(300);
$selectedListItem = $(this).parents('div.categoryItemContainer').parent();
});
我使用 google chrome 浏览器跟踪代码，$("button", "#contextManu") 在 contextMenu div 中找到了两个按钮，但没有更改它。
最佳答案
您的选择器在这一行有错别字:
$("button", "#contextManu").removeClass('disabled');
#contextManu 需要将 a 更改为 e，如下所示:
$("button", "#contextMenu").removeClass('disabled');
关于javascript - Jquery .addClass 和 .removeClass 不工作？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24912687/